Home / 138,299,970.54-190,864,838.94-78,763,784.20

Finding the Fourth Proportional to 138,299,970.54, 190,864,838.94 and 78,763,784.20

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Solution

The fourth proportional to 138,299,970.54, 190,864,838.94 and 78,763,784.20 is: 108,700,218.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,299,970.54 : 190,864,838.94 = 78,763,784.20 : x
  2. Step 2: Convert to fraction form
    138,299,970.54/190,864,838.94 = 78,763,784.20/x
  3. Step 3: Cross multiply
    138,299,970.54x = 190,864,838.94 × 78,763,784.20
  4. Step 4: Simplify right side
    138,299,970.54x = 15,033,236,985,637,918
  5. Step 5: Solve for x
    x = 15,033,236,985,637,918/138,299,970.54
  6. Step 6: Final answer
    x = 108,700,218.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.